Early political involvement At a dinner party in 2012, Regan was asked by guests for her opinion on the
2014 Scottish independence vote. Her then husband, who was born in England, assumed Regan would vote 'No'; however, after she conducted research she had found herself to be more leaning towards the 'Yes' movement. She recalled being "really passionate about Scotland becoming an independent country – I felt the arguments were really strong and I wanted Scotland to have more democratic choice". She was elected, defeating the
Leader of the Scottish Labour Party Kezia Dugdale.
Backbencher In June 2016, Regan was appointed as Parliamentary Liaison Officer to the
Cabinet Secretary for Culture, Tourism and External Affairs. In April 2019, Regan was one of 15 SNP politicians who signed a public letter calling on the Scottish government to delay reform to the
Gender Recognition Act, which would make it easier for
transgender people to legally change their gender. Later that month, an exchange between Regan and fellow SNP MSPs
Gillian Martin and
Ruth Maguire was leaked. In it, they expressed frustration at Nicola Sturgeon and claimed she was out of step with the SNP group. In June 2019, it was reported that some of her ex-employees received pay-offs worth thousands of pounds and some signed
non-disclosure agreements. Regan faced a selection challenge in 2021, from a local councillor. In the
2021 Scottish elections, Regan was re-elected, this time increasing her vote share by more than 8,000. Sturgeon reappointed Regan as community safety minister in the
third Sturgeon government. On 27 October 2022 Regan resigned, citing concerns over the Scottish Government's support for the
Gender Recognition Reform Bill.
Elena Whitham succeeded her as Minister for Community Safety in November, subject to parliamentary approval.
2023 SNP leadership election On 18 February 2023, Regan declared her candidacy in the 2023 SNP leadership election, following the resignation of Nicola Sturgeon. Regan said she would not introduce laws that would "[make] things more difficult for businesses" or "interfere with family life".
Humza Yousaf was elected the new leader on 27 March with 48.2% of first preference votes and 52.1% of the vote after third-placed candidate Regan's second preferences were redistributed.
Alba Party During the SNP leadership election, Regan was advised by a former staffer to Alex Salmond who had run as an Alba Party candidate against the SNP
the year prior, and the only SNP parliamentarian to endorse her was
close to Salmond. On 28 October 2023, seven months after coming third (out of 3 candidates) in the contest, she left the SNP and joined the Alba Party, becoming the first MSP ever to directly defect from one party to another. Regan said she was leaving as she thought the SNP had "lost its focus on independence".
The Herald reported that Regan, who joined the SNP in 2014, seven and a half years after
the SNP were first elected to government, "claimed that her old party had been hollowed out by careerists whose views did not align with the core beliefs of the SNP". As the sole MSP for Alba, Regan became their first representation in the Scottish Parliament, and one of three elected members
at any level of government, alongside MPs Kenny MacAskill, her predecessor as MSP now leader of the party, and
Neale Hanvey, all of whom were elected while members of the SNP. In that month, a
government crisis began when Yousaf terminated the
Bute House Agreement between the SNP and the
Scottish Greens, and the Greens subsequently pledged support for a
vote of no confidence in Yousaf as proposed by the Scottish Conservatives. With Regan's support, Yousaf could force the motion to a tie, which would by convention, be then defeated by the Presiding Officer's vote in favour of the status quo. She sent a list of demands to Yousaf in exchange for her support; these included progress on independence, and protecting the rights of women and girls. Yousaf chose to announce his resignation rather than work with Alba, saying that he believed the vote of no confidence could have resulted in his favour, but he choose to resign instead as he was "not willing to trade [his] values and principles, or do deals with whomever, simply for retaining power". On 9 January 2025, Regan announced her candidacy for the
2025 Alba Party leadership election. On 26 March 2025, she was defeated by her MSP predecessor
Kenny MacAskill 52.3% to 47.7%. On 20 May 2025, Regan formally introduced the
Prostitution (Offences and Support) (Scotland) Bill, a law which aims to implement the
Nordic model approach to prostitution in Scotland.
Independent On 10 October 2025, Regan quit the Alba Party to sit as an
independent, citing concerns about the party's "direction", and a desire to focus more on her bill to criminalise prostitution. On 6 January 2026, she was handed a two-day suspension from sitting in the
Scottish Parliament for publicly posting on
X about her intent to make a complaint against
Maggie Chapman, regarding comments made by Chapman regarding
For Women Scotland Ltd v The Scottish Ministers. The Parliament voted by 84 to 18 in favour of her suspension, with 8 MSPs formally abstaining. Regan's Prostitution (Offences and Support) (Scotland) Bill was defeated at stage one in February 2026. The bill received support from the
Scottish Conservatives,
Scottish Labour, and fellow independent MSPs (
Jeremy Balfour,
Foysol Choudhury,
Fergus Ewing, and
John Mason). However, it was opposed by the
SNP,
Scottish Greens, and
Scottish Liberal Democrats. The final vote saw 54 MSPs vote in favour, including six SNP MSPs, while 64 MSPs voted against. Regan stood as an Independent candidate on the
Edinburgh and Lothians East regional list at the
2026 Scottish Parliament election. During the campaign, she focused on issues including Scottish independence, women’s rights, and continued opposition to gender self-identification reforms. However, her campaign failed to gain significant electoral traction, and she received 1,904 votes (0.6% of the vote share) on the regional list, resulting in her losing her seat in the Scottish Parliament after serving as an MSP since 2016. ==Political views==